TY - JOUR
T1 - Neutron dominance in excited states of Mg 26 and Be 10 probed by proton and α inelastic scattering
AU - Kanada-En'Yo, Yoshiko
AU - Shikata, Yuki
AU - Chiba, Yohei
AU - Ogata, Kazuyuki
N1 - Funding Information:
The authors thank Dr. Furuno and Dr. Kawabata for fruitful discussions. The computational calculations of this work were performed by using the supercomputer in the Yukawa Institute for theoretical physics, Kyoto University. This work was partly supported by Grants-in-Aid of the Japan Society for the Promotion of Science (Grants No. JP18K03617, No. JP16K05352, and No. 18H05407) and by the grant for the RCNP joint research project.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/7
Y1 - 2020/7
N2 - Isospin characters of nuclear excitations in Mg26 and Be10 are investigated via proton (p) and alpha (α) inelastic scattering. A structure model of antisymmetrized molecular dynamics (AMD) is applied to calculate the ground and excited states of Mg26 and Be10. The calculation describes the isoscalar feature of the ground-band 21+(Kπ=01+) excitation and predicts the neutron dominance of the side-band 22+(Kπ=2+) excitation in Mg26 and Be10. The p and α inelastic scattering off Mg26 and Be10 is calculated by microscopic coupled-channel (MCC) calculations with a g-matrix folding approach by using the matter and transition densities of the target nuclei calculated with AMD. The calculation reasonably reproduces the observed 01+,21+, and 22+ cross sections of Mg26+p scattering at incident energies Ep=24 and 40 MeV and of Mg26+α scattering at Eα=104 and 120 MeV. For Be10+p and Be10+α scattering, inelastic cross sections to the excited states in the Kπ=01+ ground, Kπ=2+ side, Kπ=02+ cluster, and Kπ=1- cluster bands are investigated. The isospin characters of excitations are investigated via inelastic scattering processes by comparison of the production rates in the Be10+p,Be10+α, and C10+p reactions. The result predicts that the 22+ state is selectively produced by the Be10+p reaction because of the neutron dominance in the 22+ excitation as in the case of the Mg26+p scattering to the 22+ state, whereas its production is significantly suppressed in the C10+p reaction.
AB - Isospin characters of nuclear excitations in Mg26 and Be10 are investigated via proton (p) and alpha (α) inelastic scattering. A structure model of antisymmetrized molecular dynamics (AMD) is applied to calculate the ground and excited states of Mg26 and Be10. The calculation describes the isoscalar feature of the ground-band 21+(Kπ=01+) excitation and predicts the neutron dominance of the side-band 22+(Kπ=2+) excitation in Mg26 and Be10. The p and α inelastic scattering off Mg26 and Be10 is calculated by microscopic coupled-channel (MCC) calculations with a g-matrix folding approach by using the matter and transition densities of the target nuclei calculated with AMD. The calculation reasonably reproduces the observed 01+,21+, and 22+ cross sections of Mg26+p scattering at incident energies Ep=24 and 40 MeV and of Mg26+α scattering at Eα=104 and 120 MeV. For Be10+p and Be10+α scattering, inelastic cross sections to the excited states in the Kπ=01+ ground, Kπ=2+ side, Kπ=02+ cluster, and Kπ=1- cluster bands are investigated. The isospin characters of excitations are investigated via inelastic scattering processes by comparison of the production rates in the Be10+p,Be10+α, and C10+p reactions. The result predicts that the 22+ state is selectively produced by the Be10+p reaction because of the neutron dominance in the 22+ excitation as in the case of the Mg26+p scattering to the 22+ state, whereas its production is significantly suppressed in the C10+p reaction.
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U2 - 10.1103/PhysRevC.102.014607
DO - 10.1103/PhysRevC.102.014607
M3 - Article
AN - SCOPUS:85089265241
SN - 2469-9985
VL - 102
JO - Physical Review C
JF - Physical Review C
IS - 1
M1 - 014607
ER -